I spot-check every day (clean poop, wet substrate, that sort of stuff). Once a month take everything out, clean hides/water bowl/accessories. Take out all substrate. Then I spay the viv with Viv clean disinfectant by Pro reptile, leave for a few minutes and then wipe out with warm water. It is also recommended that you remove shed as soon as it comes off as well.
So tl:dr, spot-check daily, full clean monthly. Hope this helps!